如何在 SQL 服务器中的列中显示数据行

Question

我正在寻找一种方法来显示表中的数据，该表为 1 个电话号码返回 3 个（这个数字可能会有所不同）不同的记录。

结果表示例... https://i.stack.imgur.com/gB0db.png

但是，我想做的是这样显示它，基于按日期和时间排序的呼叫等级.... https://i.stack.imgur.com/dIJvZ.png

Answer 1

如果您知道所需的列数，则可以使用条件聚合：

select ani,
       max(case when rank = 1 then calldate end) as calldate_1,
       max(case when rank = 1 then calltime end) as calltime_1,
       max(case when rank = 1 then calltype end) as calltype_1,
       max(case when rank = 2 then calldate end) as calldate_2,
       max(case when rank = 2 then calltime end) as calltime_2,
       max(case when rank = 2 then calltype end) as calltype_2,
       max(case when rank = 3 then calldate end) as calldate_3,
       max(case when rank = 3 then calltime end) as calltime_3,
       max(case when rank = 3 then calltype end) as calltype_3
from t
group by ani;

Answer 2

这不是您想要的，但可能有用：

返回两列（每个电话号码一行）：ANI 和一个文本列，其中 rest o 数据连接。

SELECT 
        ANI,
        STRING_AGG(
             '[CallDate: ' + CONVERT(varchar, CallDate, 103)  + ', ' 
             'CallTime: ' + CONVERT(varchar, CallTime, 108)  + ', ' 
             'CallTypeID: ' + CAST(CallTypeID AS varchar) + ']', '  ') AS Data
FROM t
GROUP BY ANI;

如果列类型是一些文本，则不需要 CAST 或 CONVERT。

Answer 3

这是一个带有游标和动态脚本的解决方案 该解决方案可以用于每天的调用次数。

数据存储在表调用中

您期望的数据存储在表Calls_Columns中

1. 首先计算 N=(i) 的最大数量 i 是 calldate,calltime.. 列的索引。

2）创建一个表Clls_columns，第一列=ANI。

3) 然后对于 i=1 到 N，添加列 calldate_i,calltime_i...

4) 并使用 with CTE 指令更新 CALLS 表中的每一列。

希望能帮助到你：

if exists(select 1 from sysobjects where name='CALLS') drop table calls
if exists(select 1 from sysobjects where name='Calls_column') drop table Calls_column


CREATE TABLE CALLS (ani varchar(20),callDate date,callTime time, calltypeID int,CallRank int)
insert into CALLS values
('01234567890','01/04/2021','12:35:25','111','1'),
('01234567890','01/04/2021','13:35:10','111','2'),
('01234567890','01/04/2021','15:40:00','111','3'),
('71234567890','02/04/2021','12:35:25','112','1'),
('71234567890','02/04/2021','13:35:10','112','2'),
('71234567890','02/04/2021','15:40:00','112','3'),
('71234567890','02/04/2021','17:40:00','112','4')

declare @max as int
set @max=(
select  top 1 count(1) N from CALLS group by calldate order by count(1) desc)

create table Calls_column(ani varchar(20))
declare @script as varchar(max)
declare @i as int

set @i=1
while @i <=@max
begin
set @script='alter table Calls_column  add callDate_'+CAST(@i as varchar(2))+' date'
exec(@script)

set @script='alter table Calls_column  add callTime_'+CAST(@i as varchar(2))+' Time'
exec(@script)

set @script='alter table Calls_column  add calltypeID_'+CAST(@i as varchar(2))+' int'
exec(@script)
set @i=@i+1
end;

 declare mycursor cursor for
with cte as(
select ani,calldate,calltime,calltypeID,ROW_NUMBER() over(partition by ani order by calltypeid) n from CALLS)
select * from cte
declare @ani as varchar(20)
declare @calldate as date
declare @calltime as time
declare @calltypeID as int
declare @o as int
open mycursor
fetch mycursor into @ani,@calldate,@calltime,@calltypeID,@o
while @@FETCH_STATUS=0
begin

set @script='if not exists(select 1 from Calls_column where ani='''+@ani+''') insert Calls_column(ani)
values('''+@ani+''')'
print @script
exec(@script)

set @script='if exists(select 1 from Calls_column where ani='''+@ani+''') update Calls_column
set calldate_'+CAST(@O AS varchar(2))+'='''+cast(@calldate as varchar(20))+''' where ani='''+@ani+''''
print @script
exec(@script)


set @script='if exists(select 1 from Calls_column where ani='''+@ani+''') update Calls_column
set calltime_'+CAST(@O AS varchar(2))+'='''+cast(@calltime as varchar(20))+''' where ani='''+@ani+''''
print @script
exec(@script)

set @script='if exists(select 1 from Calls_column where ani='''+@ani+''') update Calls_column
set calltypeid_'+CAST(@O AS varchar(2))+'='''+cast(@calltypeid as varchar(20))+''' where ani='''+@ani+''''
print @script
exec(@script)

fetch mycursor into @ani,@calldate,@calltime,@calltypeID,@o
end
close mycursor
deallocate mycursor


select * from Calls_column